Physics Opportunities at an Electron-Ion Collider XI

Session

Parallel

Feb 24, 2025, 4:10 PM

Graham Center 140 (Miami, Florida International University, Modesto Maidique Campus)

Conveners

Parallel: Parallel 1a

• Lei Guo (Florida International University)

33. Deeply virtual production of a phi meson at threshold

Jakob Schoenleber (Brookhaven National Laboratory)

2/24/25, 4:10 PM

talk

We discuss exclusive $\phi$-meson electroproduction off the proton near threshold within the GPD factorization framework.
We propose the "threshold approximation" in which only the leading term of the
conformal partial wave expansion of the process amplitudes
is kept in both the quark and gluon exchange channels.
We test the validity of this approximation to next-to-leading order in QCD...

19. A new look to azimuthal modulations and extraction of generalized parton distributions

Dr Zhite Yu (Jefferson Lab)

2/24/25, 4:25 PM

talk

Azimuthal modulations are crucial in the phenomenological extraction and separation of various generalized parton distributions (GPDs). Traditionally, GPDs could be extracted from angular modulations of the deeply virtual Compton scattering (DVCS) in the Breit frame. However, the Bethe-Heitler subprocess (BH) interferes with the DVCS and contaminates the azimuthal modulations from DVCS, making...

44. Gravitational form factors in NNLO QCD and hadron mass decompositions

Kazuhiro Tanaka (Juntendo Univ.)

2/24/25, 4:40 PM

talk

Hadron matrix elements of the QCD energy-momentum tensor are expressed by the gravitational form factors. The gravitational form factors are related to a particular moment of the GPDs, and are relevant to EIC physics. The forward (zero momentum transfer) values of the gravitational form factors allow for a decomposition of the hadron mass into the contributions from quarks and gluons, and the...

40. Gluon Saturation Effects in Exclusive Heavy Vector Meson Production

Jani Penttala (UCLA)

2/24/25, 4:55 PM

talk

The gluon density inside nucleons has been observed to increase rapidly with energy, which would eventually violate unitarity. At high energies, however, nonlinear effects start to become important, slowing down the evolution of the gluon density and giving rise to gluon saturation. While there have already been strong hints of saturation effects in the currently available data, definite...

11. Unveiling chiral-odd dimeson generalized distribution amplitudes

Prof. Lech Szymanowski, Dr Shohini Bhattacharya

2/24/25, 5:10 PM

talk

Unveiling chiral-odd dimeson generalized distribution amplitudes
S. Bhattacharya, R. Boussarie, B. Pire, L. Szymanowski

Chiral-odd generalized distribution amplitudes which are the crossed matrix elements from chiral-odd quark GPDs in a meson contain valuable information on the transversity (or tensor) structure of mesons.
They are up to now inaccessible to experimental investigation. We...

29. Quark and Gluon GPD Global Analysis with DVCS and DVMP at NLO

Fatma Aslan (JLab)

2/24/25, 5:25 PM

talk

We use the GUMP (Generalized Parton Distributions (GPDs) through Universal Moment Parametrization) framework, based on the conformal moments of GPDs, to perform a unified global analysis incorporating Deeply Virtual Compton Scattering (DVCS) and Deeply Virtual Meson Production (DVMP) data. By performing simultaneous fits across these processes and incorporating Next-to-Leading Order (NLO)...